1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'u7rjgp36s8l1rgg95h3lirj4h4', '54.198.212.30', '1539856552', '1539856552', '/catalog/default.php?cPath=57_204&osCsid=r0j6phm8vhjbs4qfsn6548l632')

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